Some Basic Conc...

If an equivalent weight of an element is $$32$$, then the percentage of oxygen in its oxide is : 

Which of the following has the largest mass of carbon per gram?

All the substances listed below are fertilizers that contribute nitrogen to the soil. Which of these is the richest source of nitrogen on a mass percentage basis?

What is the mass percent of carbon in carbon dioxide?

Cost of a fertilizer is based on the percentage of nitrogen in it. Which of the fertilizers should be priced maximum?

Cortisone is a molecular substance containing $$21$$ atoms of carbon per molecule. The mass percentage of carbon in cortisone is $$69.98\%$$. It's molar mass is:

A certain metal sulphide, $$MS_2$$, is used extensively as a high temperature lubricant. If $$MS_2$$ is $$40.06\%$$ by mass of sulphur, metal $$M$$ has atomic mass :

Which has maximum percentage of $$Cl$$?

$$Na_2SO_3\cdot xH_2O$$ has $$50\%$$ $$H_2O$$ by mass. Hence, $$x$$ is :

Which pair has the same percentage of carbon?